By Wally Pyrah SHA TIN in Hong Kong serves up another highly competitive, but fiendishly difficult, 10-race programme on Sunday where finding winners, at least judged on the formbook, is going to be a task. The feature race on the card is the Nam Long Shan Handicap (10.50am), a Class Two contest worth just over £300,000 and run over the extended mile on the all-weather surface. This is a contest with just too many imponderables, with the likes of all-weather specialists Adefill, All For St Paul’s, Berlin Tango and Apache Pass taking on some useful middle-distance performers, notably Moments In…